This is a procedure where a small amount of the fluid surrounding the fetus (amniotic fluid) is withdrawn under ultrasound guidance. This is usually performed around the 15th week of pregnancy. The two most common indications for amniocentesis are to detect chromosomal abnormalities, such as Down's Syndrome, or to detect abnormalities in the formation of the brain or spinal cord (Neural Tube Defects). The results of this procedure will also include the baby's gender. It is important to advise your doctor if you do not wish to know the gender of your baby.
What does it involve?
An ultrasound scan is performed to check on the baby's age and to choose a site for amniocentesis. Local anaesthetic is used to numb the skin and the needle is then inserted into the uterus.A small amount of amniotic fluid is then removed. This is not painful but some discomfort following the procedure is not unusual.
How long will it take?
The examination takes approximately 30 minutes. The Neural Tube Defect tests take about 3 days to be completed and the chromosomal studies, two to three weeks.
Is there any preparation?
No special preparation is required. Sometimes there is some discomfort after the procedure, so it is a good idea to have your partner or a support person to drive you home.
Aftercare:
It is a good idea to have a quiet day after the procedure. If you have any vaginal blood or fluid loss, you should contact your referring doctor immediately. There may also be some soreness around the needle site.
More detailed instructions will be given when you arrange your appointment.
If you have any questions, please do not hesitate to call us on:
0800 ULTRASOUND (0800 858 727) or 520 9550.
